<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="app">
    <input type="text" v-model="message">
    <h2>{{message}}</h2>
<!--本质-->
<!--    <input type="text":valule="message" @input="message = $event.target.value">-->
</div>
<script src="../js/vue.js"></script>
<script>
    const aaa = new Vue({
        el: "#app",
        data: {
            message: "hello,guys",
        }
    })
</script>

</body>
</html>